Double-action pump for oil and other wells



@&. 28, 1 3,513,392

c. G. WAHLSTROM DOUBLE ACTION PUMP FOR OIL AND OTHER WELLS Filed May 6, I922 .-li uid in the well.

i ing considerable li Patented Get; 28, 1924.

EE' res area CEA RLESG. WAHLSTROM, OF 'AKRON, OHIO.

Application filed May 6,

To all whom it may concern I Be it known that 1 CHARLES G. WAI-Hr STROM, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented certain new and useful Improvements in Double-Action Pumps for Oil and Other Wells, of which the following is a specification.

This invention relates to pumps and in such connection it relates more particularly to the novel construction and arrangement of the. parts thereof.

The principal object of the invention is to provide a 'pum for conditions requiriting power, particularly for oil wells, also for use in other wells, and which is double-acting, performing a working or lifting stroke in both up and down movements of its pistons.

Another object is to provide a pump of this character in which the pump pistons have a rotary, vertically reciprocating action, and which are arranged in pairs atvarious. depths in the well to release the pressure gradually by arranging more ca pacity for each pair of istons above the ones next below.

- The pump is also constructed of few parts and is of economical manufacture.

The invention will be more fully understood by reference to the following descrip tion, taken in connection with the accompanying drawing, forming part hereof, in which Figure 1 is a vertical sectional view of the pump, in broken formation, and illustrating the pistons in one position.

Figure 2 is a similar view and illustrating the pistons as they appear when drawn together and turned about one-quarter around.

Figures 3 and 4 are cross-sectional views, on lines 3-3 and M, respectively, of Figure 5; and

Figure 5 is a sectional detail view of a portion of the pump cylinder and one of he 'pistons.

Referring more in detail to the drawings,

1 denotes the pump cylinder with top closure 2 and bottom ciosure 3, provided with apertures 4 4t for entrance of oil or other isposed within the cylinder .1 are pistons 5, 5 which are arranged to operate ther in pairs and in such number as the depth or size of the well requires. These 1922. Serial No. 558,876.

pistons are carried on an operating piston in the manner illustrated on the drawingk- In Figure 2 the piston 5 has completed its downward and the piston 5' its upward stroke, the two being drawn together and turned about one-quarter revolution, the position in Figure 1 illustrating the Vs in inverted and in Figure 2 in normal V position. The channel in piston 5 is arranged in inverted'relation to the channel in piston 5 as shown in the. drawing, so that the pistons will move upward and downward in opposite directions.

Seated in the wall of the cylinder 1 are a plurality of rollers 12-12 which rotate on screw pivots 13. These rollers ride in the channels 11-.11'as the pistons are rotated bythe gears 7 and 8 to operate the ump.

Each of the pistons is centrally bored at 14: for the piston rod 6, and screw-threaded into the upper end of the bore is a nut 15 which encircles the rod 6 and which contains a piston ring 15 for the purpose of eliminating leakage around the piston rod.

In Figures 3, 4t and 5 it will be noted that the piston rod 6 has a pair of rollers 1616 which rotate on a pin 17 in the piston rod. These rollers revolve in vertical groovesf1818 adjacent the central bore 1 1 as the pistons rotate in their up and down direction.

In each piston are ports 19--19 provided with ball valves 20-20. Each port has a pin 21 to prevent the balls from becoming dislodged. 22 is a-piston ring of larger diameter to provide a tight'fit for the piston in the cylinder. 7 d Referring to Figures 1 and 2, 1n operation rotation of the piston rod 6 will rotate the pistons 5 and 5 the. rollers 1 212 riding in the channels 11 of piston 5, causing it to travel downward, while piston 5' will move upward, since the channels in piston 5 are in inverted relation to those on piston 5;

In Figure 2 both pistons are shown as having completed one-half of their stroke, conpiston 5 makes its downward stroke thep is oon 5 will simultaneously porfoi'in its UPWEPEfii stroke, its ports being olosocl, and will force the oil upwarsl into (lslivory pi} e 23. The pistons are then in the position shown in Figui's As the rod. 6 coi'it-innes to rotate "the pistons will now move in ion of i have so alternzito approaching one. ncl 'bho RChZiCQHi) oisiions ing movement a. the adjacent pairs oi pistons l L s 2'.

like alternate approocliiv movement so as to provide oonmnuoi oi the iiuiil being pumped, the 1mg the channels of an upper pair of pisizo boing of less lowers filion ilili. angles of opposite directions, poms 19-19 in piston channels tie next adjacent 5115i 5 being onenod and those in piston 5 the kl upper TPlSl/ in order to pi'ovido a, isstr woven: i. of lon' n tho said lo thopisions at tho upper oncl of the cylinder, pistons.

to the depth 01 of the "Well, 1i. pon'ip for oil wells and the like in the angles tho f-gvoovos or channels eluding 9. cylinder, formed with an io o,

l1-11. of an upper pair of pistons are formed of loss degree 112.11 she. angles of the grooves of the next went lower pair. It should also be understood that changes andv niodificosion may be inside in the arrangoinent ami construction of the pun as may fall Within the s irii and. scope o. itlio following 1. Apninp for oil Wells and ililB like in eluding a. oylinclor, formed with an inlet at its lower end for submersion in the well a piston rod in the cylinder, a pin 'alicy C-i pairs ofpistons carried by the rod, -1Cl1 piston having peripheral undulating channel, moans carried by illlS cylinder-21nd "roonnso an inci'oa jsoont lUT-Qi' pair 0% pistons.

T nony Wlisioof lmfvo .si

in name to tins specification.

WAlrlLSTflCY 

